Change the way Perl modules are installed, update the default Perl to 5.18.
Before, we had:
site_perl : lib/perl5/site_perl/5.18
site_perl/perl_arch : lib/perl5/site_perl/5.18/mach
perl_man3 : lib/perl5/5.18/man/man3
Now we have:
site_perl : lib/perl5/site_perl
site_arch : lib/perl5/site_perl/mach/5.18
perl_man3 : lib/perl5/site_perl/man/man3
Modules without any .so will be installed at the same place regardless of the

search.cpan.org redirect reduction canonicalization project, pass 1:
URLs automatically rewritten from /search?dist=Foo or /dist/Foo
to /dist/Foo/ (note trailing slash). After a 2002(!) reorganization,
this is the preferred way to refer to modules on search.cpan.org.
This pass brought to you by http://people.freebsd.org/~fenner/fix-search